Sprayer



nvemcom CHARLES EBRADLM 6c J'oscPH G CorFlN.

C. E. BRADLEY ET AL v sPAYER Original Filed Dec. '2, 19.21

Patented Oct. 27, `1925.

UNITED STATES CHARLES E. BRADLEY, 0E MoN'rcLiiia, NEW JERSEY, AND JOSEPH o. coEEIN, on.

PATENT orifice.y

HEMPSTEAD, NEW YORK, ASSIGNORS T0 GENERAL RUBBER COMPANY, A COBf PORATION 0F NEW JERSEY.

Original application iled December To all whom, t may concern'.

VBe it known that we, CHARLES E. BRAD- Lm;` and JOSEPH G. CoFFiN, both citizens of the United States, and residing at'Montclair, in the county of Essex and State of New Jersey, and Hempstead, Long Island, .in the county of Nassau and State of New York, respectively, have invented a certain new and useful Sprayer, `of which the following is a full, clear, and exact description. y

This invention relates to asprayer, more particularly to a sprayer of thetype disclosed in our copending application Serial No. 520,505, filed December 7 1921, now Patent No.f1,428,526, of which this is a division.

In ourapplication above mentioned there is disclosed anap aratus for uniformly distributing" finely divided particles of rubber latex -in a drying medium to thereby drive oifthe contained moisture in the latex,while the dry particles of latex settle by gravity to a collecting surface from which they may be removed as desired. The ordinary types of compressed air sprayers when used for the purpose of spraying the latex, are open to several objections, one of which 4is that they are not economicaLforthe reason that in compressing the .air used in spraying yconsiderable heat is developed which is lost, and during the spraying operation the eX- pansion of the air causes fa considerable drop in temperature, which must be overcome by either increasing the quantity 'of the drying medium used or heating it to a higher temperature. Another objection is that the particles 'as sprayed by a compressed' air' sprayer vary considerably in size and include a proportion of extremely fine dust-like particles which when dry do not vreadily separate out by gravity from the drying medium, but tend to be carried along therewith. recover such extremely fine particles except by the use of relatively expensive additional apparatus. Moreover the particles .as sprayed by compressed air cannot be distributed in the drying medium with the uniformity desired.

An object of our invention is to provide .an `-`improved and economical sprayer for latex or similar material.

It is not practicable tof SPRAYEIR'.

7, 1921, Serial No. 520,505. Divided and this application iled April 3, 1922. Serial No. 549,359.

Another object is'to provide asprayer in which the sprayed particles will be of. relatively uniform size and uniformly distributed as compared with pressure or compressed air sprayers.

Still another object is to provide a sprayer of the rotatable disk type in which the fluid will be delivered to the disk with the least possible disturbance.

A further object is to provide a sprayer of the disk type in which the fluid to be sprayed will be effectively protected against heating until delivered to the disk.

Fora detailed disclosure of the invention reference is had to the :accompanying speci iicat'ion and drawing, in which latter:

Fig.A l represents a vertical section through the sprayer; v

Fig. 2 is an enlarged detail of the discharge nozzle; and

Fig 3 is a similar detail illustrating a slightly modified form of nozzle.

Referring to the drawings the numeral 1 represents the sprayer generally, which latter may be secured to any suitable support .2, such as the ceiling of a room or chamber in which the sprayer is to be mounted. .An enclosed supporting frame or casing 3i is provided, vwhich for convenience in asseml blage ma be made in two sections secured projecting end of the shaft is provided with a pulley 1Q by which the shaft may be rotated, but 1s is evident that any other suit able form of drive, such as gearing, may be substituted. A spraying disk 11 isfsecured to the lower projecting end of the shaft, which disk is preferably formed tapering towards its edge-f as shown, and preferably with a flat, smooth upper surface. IThis disk may be made of any suitable noncor roding `-alloy or, of nickel plated steel. Surrounding the lower projecting portion of the shaft and secured to the casing 3, is a tapered tube 12 which extends to a polilt closely adjacent the disk 11, and forms one wall of a discharge passage.

Inorde'r to prevent drip of oil from the bearings on the disk 11 during operation the shaft 7 is provided with a series of annular grooves 13 which form between them .a series of ridges adapted to centrifugally project any oil drip, the discharged oil being collected in a catch-basin 14 at the bottom of-casing 3, from which it may be withdrawn in any suitable manner, as by the pipe 15. Surrounding the casing 3 and spaced from it to provide a latex chamber 16 is a cooling jacket formed bv an outer wall 17 and an inner wall 18. These walls are joined at their upper ends, and the cooling jacket is secured to the casing 3 by bolts- 19. At the lower end of the cooling jacket the walls 17 'and 18 are also joined, the lower portion of the jacket being formed of a frusto-conical shape as shown at 20, and the jacket is steadied against vibration by means of the screw rods.21 bearing against the upper end of the tube 12. A nozzle 22 is adjustably secu/red in the lower end of the cooling jacket, as by means of screw threads, and hel'd in adjusted position by the lock nut 23, this nozzle forming in connection with the tapered tube 12 a discharge outlet from the latex chamber) 16 to fthe eX-. posed surface of the disc 11, this outlet being adjacent to but independent of the shaft `als 7. A supply pipe 24 for the latex or other material to be sprayed communicates with the upper end of the chamber 16, Aand a supply pipe 25 for the cooling agent, such as water, passes down through the latex chamber and is tapped into the lower end of theJ cooling jacket, while at the upper end of the. jacket an exhaust pipe 26 for the cooling agent is provided.

It is important, owing to the high speed at which the disk is rotated. that the latex be led from the chamber 16 onto the disk with as little disturbance as possible, as otherwise the latex tends .to be thrown off the disk before it has reached the edge and attained the desired horizontal speed. The inner wall of the nozzle 22 is therefore made of a rounded flaring or horn shape at its lower end, as shown at 27. The horizontal length of the passage between this hornshaped end and the disk vmay be relatively short as shown in Fig. 2, or thev flaring end of the nozzle 28 may be laterally extended to some distance. as shown at 29 in Fig. 3, this horizontal length vpreferably vvarying from about I of an inch to'% of an inch.

In operation, the disk is rotatedat a relatively high speed by means vof the pulley 10, and water is first supplied throughvthe pipe 24 to "chamber", 16, and discharged through nozzle 22 on the disk 11.- As 'the disk rotates in a chamber filled with a rather highly heated drymgmedium. if latex were at which the is rotated,

supplied at thebeginnidng to the disk it would tend to coagulate and burn thereon but by first admitting the water to the sprayer disk it is cooled suiiciently to permit the subsequent gradual substitution of latex without injury to the latter. By adjusting the nozzle 22 toward and from the disk any desired regulation of the flow of latex maybe obtained. As the latex flows outwardly on the uncovered or exposed surface of the revolving disk it acquires a high radial velocity as well as a high circumferential one, and as it reaches the edge of the disk@ has a resultant velocity of about .l

one and four tenth times the 12in speed 'of the disk. A rim speed of about 300 miles pervhour has been found to be suitable for the disk when spraying latex, but it is evident that this speed may be variedas desired. By reason of the relative movement between the sprayer disk and the nozzle 22 any tendency of the outlet to become clogged is avoided. As the latex is uniformly discharged from all portions of the periphery of the disk it is evident that a very uniform distribution in the drying medium can be secured, and it has also beeny found that the variation in the size of the particles is relatively small as compared with those obtained by compressed air spraying, this variation not being ordinarily greater than frdm.,a unit diameter to ten times .they diameter: The formation of extremely small dust-like particles, such 'as those smaller than .l0 milt i which'are diicult to recover when dry;

affected by heat, which tends to coagulate it,

it is Adesirable that the supply chamberor passage by which the latex is conducted. to the discharge nozzle 22 be protected from the heat of the drying. medium in which it is disposed, andthe cooling' jacket 17, 18 eifectively performs this function. Rubber latex is also extremely sensitive to agitation and shock, and therefore as pointed out in the objects it is essential that it be handled with great care during the spraying operation and delivered `to the spraying discl with as little disturbance as possible in order to prevent coagulation and consequent clogging of. the apparatus. For this reason the latex discharge outlet formed by the tube 12 and nozzle 22 "is providedy by ywhich construction' any contact ofthe llatex withthe rapidly revolving shaft 7 is prevented. If the latex were allowed to contact with the shaft at any time during its ow to the portion of the latex chamber and discharge outlet. The frame or casin',,;.3l with its renforcing ribs 6 effectively prevents undesirable vibration due to the high speed' may be used for spraying other'liquids.

While adetailed disclosure of one embodiment of the inventionv has been made, it 1s evident that changes may be made therein,

and it is not desired that the invention shall be limited otherwise than as set forth in the appended claims.'l

Having thus 'described our invention, what we claim' and desire to protect by Letters Patent is:r .4

1. A sprayer for latex or other -li uid comprising a smooth, unobstructed isc, means for rotating the-same, and means for discharging the liquid/centrally of the disc comprisin atabula-??-I fwall 'terminating closely adjacent the and a surrounding adjustable wall concentric therewith and co"- acting with the disc to* forni"v an adjustable outle v 2. A, sprayer f comprising a shaf eansjfor, rotating the same, a disc ontheendoftlie shaft, a liquid char .ber havingan annulary outlet independent of and surroundin "said shaft'adjacentthe disc,VVA adjustab e means for varying the rate of discharge froinsaid outlet. f

3f A 'sprayer forlatex or other liquid comprising a shaft, `means forl rotating the same, adisc von the'f'end 'of said shaft, a

liquid chamber surrounding and spaced 'from said shaft throughout its length and having an outlet adjacent said disc, means for varying the distaneevof said outlet from the disc, and heat insulating means surrounding said chamber.

4. `A sprayer for latex or other liquid comprising afrigid'frame, a vertical shaft journaled in said 'frame adjacent its ends,

means at the upper end of the shaft for rotating it,a disc secured to the lower end of the shaft and having a flat, unobstructed surface, an lannular liquid chamber surrounding and spaced from said shaft and havingan open lower end. spaced from said dise to form a discharge opening, and means for varying the size of said openin 5'. A sprayer comprisin a rotatalilye shaft, a spraying disc secured t ereto and having env-lion other liquidl an uncovered upper surface, means for discharging luid on the uncovered surface of saiddis'c symmetrically of said shaft and on the same side of the disc as said shaft, and means for preventing contact of said fluid with rotating parts prior to its discharge on said disc. j

6. A latex sprayer comprising a shaft, means for rotating the same, a spraying disc secured to an end of the shaft, means for centrally and smoothly discharging latex or other fluid on the disc including a nozzle surrounding the shaft adjacent the disc, said nozzle having a rounded lilarin end, means whereby the nozzle may be afjusted toward and from the disc, and means for shielding the latex from moving parts prior to its discharge on the disc.

7; A latex sprayer comprising a shaft, means for lrotating the same, a spraying disc secured to an end of the shaft, means for centrally and smoothly discharging latex or other iiuid on the disc including a nozzle surrounding the shaft adjacent the disc, said nozzle having a rounded and horizontally-extended flaring end, means whereby the nozzle may be adjusted toward and from the disc, and means for shielding the latex from rotating parts prior to its discharge on the disc.

8, A latex sprayer comprising an enclosed casing, a shaft extendin therethrough and projecting above and be ow the same, bearings in said casing for the shaft, means for rotating"the shaft, a spraying Adisc secured 'shaft below the bearings and a catch basinv in the casing adjacent said ridges.'

Signed at New York, in the county of New York, and State of New York, this 28 day of March, 1922. l

CHARLES E. BRADLEY. JOSEPH G. coFFIN. 

